Would you book this airport?

I was speaking to a client the other day who was looking for a Christmas cruise. He wanted to cruise the Caribbean and he wanted to cruise for at least a month. Beyond this all he was really looking for was a cheap deal as he was going to be cruising as a single passenger so he wanted to avoid any massive single person supplements.
We finally settled on a P&O back to back cruise of 28 days. The only problem was although P&O still had plenty of flights to get him out there, because it was a Christmas cruise they didn't have any flights coming back. It was then that P&O offered us a really strange solution........